diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 1d3a440bbd36dee1714d68c7941aa9be5d78b21f..37f8cb842eea1802ce044ed89310d7b6c865d173 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -85,12 +85,12 @@ typedef struct {
     int rptr, wptr, count;
 } PS2Queue;
 
-typedef struct {
+struct PS2State {
     PS2Queue queue;
     int32_t write_cmd;
     void (*update_irq)(void *, int);
     void *update_arg;
-} PS2State;
+};
 
 typedef struct {
     PS2State common;
@@ -551,9 +551,8 @@ static uint8_t translate_table[256] = {
     0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
 };
 
-void ps2_queue(void *opaque, int b)
+void ps2_queue(PS2State *s, int b)
 {
-    PS2State *s = (PS2State *)opaque;
     PS2Queue *q = &s->queue;
 
     if (q->count >= PS2_QUEUE_SIZE - 1)
@@ -692,13 +691,12 @@ static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
     }
 }
 
-uint32_t ps2_read_data(void *opaque)
+uint32_t ps2_read_data(PS2State *s)
 {
-    PS2State *s = (PS2State *)opaque;
     PS2Queue *q;
     int val, index;
 
-    trace_ps2_read_data(opaque);
+    trace_ps2_read_data(s);
     q = &s->queue;
     if (q->count == 0) {
         /* NOTE: if no data left, we return the last keyboard one
diff --git a/include/hw/input/ps2.h b/include/hw/input/ps2.h
index 7f0a80af9dc6a143138ce0e37de02a405cad4c7b..94709b85026e60bc73cbbf1ee10206a06bdef71e 100644
--- a/include/hw/input/ps2.h
+++ b/include/hw/input/ps2.h
@@ -36,8 +36,8 @@ void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg);
 void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg);
 void ps2_write_mouse(void *, int val);
 void ps2_write_keyboard(void *, int val);
-uint32_t ps2_read_data(void *);
-void ps2_queue(void *, int b);
+uint32_t ps2_read_data(PS2State *s);
+void ps2_queue(PS2State *s, int b);
 void ps2_keyboard_set_translation(void *opaque, int mode);
 void ps2_mouse_fake_event(void *opaque);
 
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index f745d5faf7fd30f8b584b2e51a08a6b25b598b45..2706aabedf65fa7ad09220d6b75f3af9d81df6d0 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -76,6 +76,7 @@ typedef struct PixelFormat PixelFormat;
 typedef struct PostcopyDiscardState PostcopyDiscardState;
 typedef struct Property Property;
 typedef struct PropertyInfo PropertyInfo;
+typedef struct PS2State PS2State;
 typedef struct QEMUBH QEMUBH;
 typedef struct QemuConsole QemuConsole;
 typedef struct QEMUFile QEMUFile;